CHM3120C - EXAM #1 QUESTIONS BANK QUESTIONS AND CORRECT ANSWERS

CHM3120C - EXAM #1 QUESTIONS BANK
QUESTIONS AND CORRECT ANSWERS
ThisA2branchA2ofA2analyticalA2chemistryA2dealsA2withA2theA2determinationA2ofA2concentrati
onA2ofA2theA2targetA2analyteA2inA2aA2sample:

1.A2QualitativeA2analysis
2.A2QuantitativeA2analysis
3.A2Chemometrics
4.A2NoneA2ofA2theA2AboveA2-A2Ans--QuantitativeA2analysis

ThisA2representsA2theA2SIA2unitA2ofA2Mass:

1.A2Milligram
2.A2Gram
3.A2Kilogram
4.A2NoneA2ofA2theA2aboveA2-A2Ans--Kilogram

InA2analyticalA2chemistry,A2chemometricsA2dealsA2withA2thisA2aspectA2ofA2chemicalA2analy
sis:

1.A2Detection
2.A2SampleA2preparation
3.A2StatisticalA2analysis
4.A2NoneA2ofA2theA2aboveA2-A2Ans--StatisticalA2analysis

ThisA2isA2theA2mostA2error-proneA2stepA2inA2chemicalA2analysis:

1A2samplingA2
2.A2SampleA2preparation
3.A2Detection
4.A2NoneA2ofA2theA2aboveA2-A2Ans--NoneA2ofA2theA2above

ModernA2definitionA2ofA2"mole"A2isA2basedA2onA2theA2atomicA2massA2ofA2thisA2isotope:

1.A2^1H
2.A2^12C
3.A2^16O
4.A2NoneA2ofA2theA2aboveA2-A2Ans--^12C

AA2smallA2representativeA2portionA2ofA2theA2populationA2isA2calledA2this:

1.A2Sample
2.A2Specimen

, 3.A2Aliquot
4.A2NoneA2ofA2theA2AboveA2-A2Ans--Sample

BiologistsA2andA2biochemistsA2commonlyA2useA2thisA2unitA2toA2expressA2molecularA2mass
A2ofA2biologicalA2macromolecules


1.A2Faraday
2.A2Dalton
3.A2Kelvin
4.A2NoneA2ofA2theA2aboveA2-A2Ans--Dalton

AnA2ammoniumA2nitrateA2(NH4NO3)A2solutionA2containedA25.00A2molesA2ofA2thisA2saltA2in
A24.00A2kgA2ofA2theA2solution.A2TheA2molalA2concentrationA2ofA2thisA2solutionA2is:


1.25A2m
1.39A2m
1.55A2m
noneA2ofA2theA2aboveA2-A2Ans--1.39A2m

ThisA2AustrianA2schoolA2teacherA2wasA2theA2firstA2toA2determineA2theA2numberA2ofA2molec
ulesA2containedA2inA21A2cm^3A2ofA2anA2idealA2gas.

1.A2Avogadro
2.A2Loschmidt
3.A2Dalton
4.A2NoneA2ofA2theA2aboveA2-A2Ans--Loschmidt

Avogadro'sA2numberA2representsA2theA2numberA2ofA2elementaryA2entitiesA2presentA2inA2th
isA2amountA2ofA2substance:

1.A21A2mg
2.A21A2g
3.A21A2kg
4.A2NoneA2ofA2theA2aboveA2-A2Ans--NoneA2ofA2theA2above

InA21909,A2thisA2NobelA2laureateA2proposedA2theA2nameA2"Avogadro'sA2constant":

1.A2Fisher
2.A2Arrhenius
3.A2Perrin
4.A2NoneA2ofA2theA2aboveA2-A2Ans--Perrin

ThisA2manyA2moleculesA2areA2presentedA2inA22.25A2pgA2ofA2methaneA2(CH4):

1.A27.528A2xA210^20
2.A24.813A2xA210^13